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R-134a enters the condenser of a refrigerator at 800kPa and 50oC at a rate of 0.018kg/s and leaves at 800kPa as a saturated liquid. It is known that the compressor consumes 1.2kW of electricity at this operating condition. Determine 1) heat rejection rate to the surrounding; 2) cooling rate; and 3) the COP of the refrigerator.
Determines if the member forces are in tension or compression (note that a negative number denotes compression and a position number denotes tension)
a hydrogen tank 25 cm in diameter and 80 cm in height is charged to 150 atmospheres at room temperature 25 c. a
a venture necked-down section in a pipe develops a low pressure that can aspire fluid upward from a reservoir. derive
Crank AB of the linkage shown rotates clockwise at 300 rpm. Using graphical method, determine the velocity of point B, C, D, and E.
consider a refrigerator that accepts 15 kw of heat in the evaporator and rejects 19.76 kw of heat from the condenser.
a piece of machinery can be bought for 10000 cash or for 2000 down and annual payments of 750 for 15 years. what is the
the change in diameter 2.5 in. of a large steel bolt is carefully measured as the nut is tightened. knowing that e 29 x
Derive an expression for lift co-efficient of a Van de Vooren Airfoil having chord length =2l,thickness parameter E and trailing angle tau. Discuss the effects of E and tau on the lift of Van De Vooren Airfoil.
A stainless steel rod with a circular cross section has a length of 100 mm and a diameter of 2.0 mm. It is deformed elastically in compression by a force of 500 N applied parallel to its length. The material has a Young’s modulus of 200 GPa, and a sh..
use the generalized virial equation to speculate whether a small leak in an h2 line at 300 bar and 298 k might raise
a strip of material 1 inch wide w and initially 116 in. thick is compressed between flat dies to one half its original
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10C and delivers it at 1000 kPa, 40C. The power input is measured to be 3 kW. The compressor has heat transfer to air at 100 kPa coming in at 20C and leaving at 30C (i.e. like a heat exchanger). What..
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